OFDM中模拟分析不同频偏(中心频率偏移)对通信链路误码率的影响

1.算法描述   

 

 

 

 

 

 

 

 

 

 

 

 

2.仿真效果预览

matlab2022a仿真结果如下：

 

 

3.MATLAB核心程序

for ii = 1:length(CFO)
    
    for n = 1:length(EbN0dB)
        snr = EbN0dB(n);
        berrors = 0;tic;
        for mc = 1:MC
            x = rand(1,nDSC)>0.5;
            xt = 2*x -1; 
            xt = (nFFT/sqrt(nDSC))*ifft(fftshift(xt),nFFT); 
            xtt = [xt(end-nCP+1:end) xt];
            % Gaussian noise of unit variance, 0 mean
            nt = 1/sqrt(2)*(randn(1,nTot) + 1i*randn(1,nTot));
            yr = sqrt(nTot/nFFT)*xtt + 10^(-EsN0dB(n)/20)*nt;
            % applying CFO
            yr =(exp(1i*2*pi*CFO(ii)*(0:length(yr)-1)/nFFT)).*yr;
            % Receiver processing
            yr = yr(nCP+1:end);
            yr = (nDSC/sqrt(nFFT))*fftshift(fft(yr,nFFT));
            yr = yr > 0; % hard demodulation
            berrors = berrors + length(find((yr-x)~=0));
        end
        toc;
       BER(ii,n) = berrors/(nFFT*MC);
    end
    
end
A_102